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38f390f549
Problem was that wrong key_info variable was used, which caused UNIQUE key to be used as a covering key
9 lines
346 B
Text
9 lines
346 B
Text
CREATE TABLE t1 (pk INT AUTO_INCREMENT PRIMARY KEY, a varchar(30000), UNIQUE (a)) ENGINE=innodb;
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INSERT INTO t1 (a) VALUES (20),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL);
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SELECT * FROM t1 WHERE a BETWEEN '1' AND '100';
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pk a
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DROP TABLE t1;
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CREATE TABLE t2 (n BLOB, UNIQUE(n));
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INSERT INTO t2 VALUES (1);
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DELETE FROM t2 WHERE n = 1;
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DROP TABLE t2;
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